$('.dropdown').hover(function(){
	var $dropdown=$(this);
	$dropdown.css({
		'background-color':'white'
    });
    $dropdown.find('.dropdown-layer').show()
    $dropdown.find("li").css({
		'background-color':'#f3f3f3'        
    })

},function(){
    var $dropdown=$(this);
	$dropdown.css({
		'background-color':'',
	});
	$dropdown.find('.dropdown-layer').hide();
});









 
